add back images to readme
add back images to readme

--HG--
extra : convert_revision : svn%3A3ed01bd8-26fb-0310-9e4c-ca1a4053419f/networkx/trunk%40334

yashu-seth/networkx,nathania/networkx,nathania/networkx,NvanAdrichem/networkx,JamesClough/networkx,dmoliveira/networkx,chrisnatali/networkx,nathania/networkx,goulu/networkx,jakevdp/networkx,aureooms/networkx,SanketDG/networkx,cmtm/networkx,chrisnatali/networkx,kernc/networkx,Sixshaman/networkx,kai5263499/networkx,tmilicic/networkx,ghdk/networkx,kernc/networkx,andnovar/networkx,jni/networkx,harlowja/networkx,sharifulgeo/networkx,beni55/networkx,debsankha/networkx,ionanrozenfeld/networkx,jcurbelo/networkx,RMKD/networkx,ionanrozenfeld/networkx,blublud/networkx,bzero/networkx,michaelpacer/networkx,sharifulgeo/networkx,jni/networkx,farhaanbukhsh/networkx,aureooms/networkx,dhimmel/networkx,OrkoHunter/networkx,harlowja/networkx,ltiao/networkx,farhaanbukhsh/networkx,debsankha/networkx,kai5263499/networkx,aureooms/networkx,dmoliveira/networkx,jni/networkx,dhimmel/networkx,wasade/networkx,farhaanbukhsh/networkx,RMKD/networkx,chrisnatali/networkx,jtorrents/networkx,jakevdp/networkx,kernc/networkx,blublud/networkx,debsankha/networkx,jtorrents/networkx,dmoliveira/networkx,jakevdp/networkx,RMKD/networkx,ionanrozenfeld/networkx,sharifulgeo/networkx,harlowja/networkx,bzero/networkx,dhimmel/networkx,jfinkels/networkx,blublud/networkx,ghdk/networkx,kai5263499/networkx,bzero/networkx,ghdk/networkx